Spherical-shell model for the vanderWaals coefficients between fullerenes and/or nearly spherical nanoclusters

John P. Perdew, Jianmin Tao, Pan Hao, Adrienn Ruzsinszky, G. Csonka, J. M. Pitarke

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Fullerene molecules such as C 60 are large nearly spherical shells of carbon atoms. Pairs of such molecules have a strong long-range van der Waals attraction that can produce scattering or binding into molecular crystals. A simplified classical-electrodynamics model for a fullerene is a spherical metal shell, with uniform electron density confined between outer and inner radii (just as a simplified model for a nearly spherical metallic nanocluster is a solid metal sphere or filled shell). For the spherical-shell model, the exact dynamic multipole polarizabilities are all known analytically. From them, we can derive exact analytic expressions for the van der Waals coefficients of all orders between two spherical metal shells. The shells can be identical or different, and hollow or filled. To connect the model to a real fullerene, we input the static dipole polarizability, valence electron number and estimated shell thickness t of the real molecule. Our prediction for the leading van der Waals coefficient C 6 between two C 60 molecules ((1.30±0.22)×10 5hartreebohr 6) agrees well with a prediction for the real molecule from time-dependent density functional theory. Our prediction is remarkably insensitive to t. Future work might include the prediction of higher-order (e.g. C 8 and C 10) coefficients for C 60, applications to other fullerenes or nearly spherical metal clusters, etc. We also make general observations about the van der Waals coefficients.

Original languageEnglish
Article number424207
JournalJournal of Physics Condensed Matter
Volume24
Issue number42
DOIs
Publication statusPublished - Oct 24 2012

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Fullerenes
Nanoclusters
spherical shells
nanoclusters
fullerenes
Metals
Molecules
metal shells
coefficients
molecules
predictions
Electrons
Molecular crystals
Electrodynamics
metal clusters
Carbon
electrodynamics
multipoles
attraction
Density functional theory

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Materials Science(all)
  • Medicine(all)

Cite this

Spherical-shell model for the vanderWaals coefficients between fullerenes and/or nearly spherical nanoclusters. / Perdew, John P.; Tao, Jianmin; Hao, Pan; Ruzsinszky, Adrienn; Csonka, G.; Pitarke, J. M.

In: Journal of Physics Condensed Matter, Vol. 24, No. 42, 424207, 24.10.2012.

Research output: Contribution to journalArticle

Perdew, John P. ; Tao, Jianmin ; Hao, Pan ; Ruzsinszky, Adrienn ; Csonka, G. ; Pitarke, J. M. / Spherical-shell model for the vanderWaals coefficients between fullerenes and/or nearly spherical nanoclusters. In: Journal of Physics Condensed Matter. 2012 ; Vol. 24, No. 42.
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